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Nearsightedness (Myopia)

Nearsightedness (Myopia)

Topic Overview

What is nearsightedness?

Picture of the anatomy of the eyeNearsightedness (myopia) is a common cause of blurred vision. It can be mild, moderate, or severe. If you are nearsighted, objects in the distance appear blurry and out of focus. You might squint or frown when trying to see distant objects clearly. View a photo as seen through a normal and a nearsighted eye .

Nearsightedness is usually a variation from normal, not a disease. Less often, nearsightedness happens because of another disease or condition.

What causes nearsightedness?

Most nearsightedness is caused by a natural change in the shape of the eyeball. Less often, nearsightedness may be caused by a change in the cornea or the lens.

These problems cause light rays entering the eye to focus in front of the retina . Normally, light focuses directly on the retina . See a picture of the parts of the eye .

There is nothing you can do to prevent nearsightedness.

What are the symptoms?

The main symptom is blurred vision when looking at distant objects. You may have trouble clearly seeing images or words on a blackboard, movie screen, or television. This can lead to poor school, athletic, or work performance.

Your child may be nearsighted if he or she squints or frowns, gets headaches often, or holds books or other objects very close to his or her face. Children who are nearsighted may sit at the front of the classroom or very close to the TV or movie screen. They may not be interested in sports or other activities that require good distance vision.

If you think that your child may be nearsighted, see an eye care specialist. Treating nearsightedness early may prevent children from having trouble in school and in social settings.

When does nearsightedness start? How does it change over time?

Nearsightedness usually begins in childhood between ages 6 and 12. During the teen years, as the eyeballs continue to grow, it may develop or get worse quickly. Teenagers may need new glasses every 12 months or even more often.

Nearsightedness usually stops getting worse by age 14 to 16 in women and by the mid-20s in men. Most nearsightedness stabilizes at a mild to moderate level.

How is nearsightedness diagnosed?

A routine eye exam can show whether you are nearsighted. The eye exam includes questions about your eyesight and a physical exam of your eyes. Ophthalmoscopy, tonometry, a slit lamp exam, and other vision tests are also part of a routine eye exam.

Eye exams should be done for new babies and at all well-child visits. 1 Nearsightedness is usually first discovered in children of grade-school age.

How is it treated?

Most people who are nearsighted use eyeglasses or contact lenses to correct their vision.

Surgery can also reduce or fix nearsightedness. There are several surgery options, such as LASIK, PRK (photorefractive keratectomy), and artificial lens implants. The goal of surgery is to help you see more clearly without glasses or contacts. Most doctors consider 20/40 vision or better after surgery a satisfactory result. People with 20/40 vision or better are allowed to drive a car without corrective lenses.

If glasses or contact lenses are inconvenient for your work or lifestyle, surgery may be a good choice. But nearsightedness is not a disease, and a nearsighted eye is otherwise normal and healthy. Weigh your desire to have clear vision without glasses or contacts against the risks and cost of surgery. And be aware that you may still need to wear glasses or contact lenses after surgery.

If you are nearsighted, get regular eye exams, and see your eye care specialist if you have changes in your vision.

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Decision Points focus on key medical care decisions that are important to many health problems. Decision Points focus on key medical care decisions that are important to many health problems.
  Nearsightedness: Should I Have Laser Surgery?

Other Places To Get Help

Organizations

American Optometric Association (AOA)
243 North Lindbergh Boulevard
St. Louis, MO  63141
Phone: 1-800-365-2219
Web Address: www.aoa.org
 

The American Optometric Association (AOA), which is a national organization of optometrists, can provide information on eye health and eye problems.


EyeCare America
P.O. Box 429098
San Francisco, CA  94142-9098
Phone: 1-877-887-6327 toll-free
Fax: (415) 561-8567
Web Address: www.eyecareamerica.org
 

EyeCare America is a public service program of the Foundation of the American Academy of Ophthalmology. This site aims to raise awareness about eye diseases and eye care. It has information about eye conditions, treatments, and general eye health. You can check to see if you qualify for a free eye exam.


Food and Drug Administration (FDA): LASIK
10903 New Hampshire Avenue
Silver Spring, MD  20993
Phone: 1-888-INFO-FDA (1-888-463-6332)
Web Address: www.fda.gov/MedicalDevices/ProductsandMedicalProcedures/SurgeryandLifeSupport/LASIK/default.htm
 

This website has information for the public about laser-assisted in situ keratomileusis (LASIK) surgery. LASIK surgery is meant to reduce a person's dependency on glasses or contact lenses. It permanently changes the shape of the cornea, which is the clear covering of the front of the eye.


National Eye Institute, National Institutes of Health
Information Office
31 Center Drive MSC 2510
Bethesda, MD  20892-2510
Phone: (301) 496-5248
Email: 2020@nei.nih.gov
Web Address: www.nei.nih.gov
 

As part of the U.S. National Institutes of Health, the National Eye Institute provides information on eye diseases and vision research. Publications are available to the public at no charge. The Web site includes links to various information resources.


Prevent Blindness America
211 West Wacker Drive
Suite 1700
Chicago, IL  60606
Phone: 1-800-331-2020
Web Address: www.preventblindness.org
 

Prevent Blindness America assists the visually impaired and provides consumer information on vision problems and vision aids. Its website has information about eye health and safety for children and adults. Many states have local affiliates.


References

Citations

  1. American Academy of Pediatrics, et al. (2003, reaffirmed 2007). Policy statement: Eye examination in infants, children, and young adults by pediatricians. Pediatrics, 111(4): 902–907.

Other Works Consulted

  • Rajan MS, et al. (2006). Effects of ablation diameter on long-term refractive stability and corneal transparency after photorefractive keratectomy. Ophthalmology, 113(10): 1798–1806.
  • Trobe JD (2006). Refractive disorders section of Principal ophthalmic conditions. In Physician's Guide to Eye Care, 3rd ed, pp. 121–124. San Francisco: American Academy of Ophthalmology.

Credits

By Healthwise Staff
Primary Medical Reviewer Kathleen Romito, MD - Family Medicine
Specialist Medical Reviewer Christopher J. Rudnisky, MD, MPH, FRCSC - Ophthalmology
Last Revised June 24, 2011

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